The BGP Instability Report

The BGP Instability Report is updated daily. This report
was generated on 30 July 2010 06:15 (UTC+1000)

50 Most active ASes for the past 7 days

RANK	ASN	UPDs	%	Prefixes	UPDs/Prefix	AS NAME
1	4725	42987	2.52%	129	333.23	ODN SOFTBANK TELECOM Corp.
2	25620	25906	1.52%	167	155.13	COTAS LTDA.
3	30890	23547	1.38%	447	52.68	EVOLVA Evolva Telecom s.r.l.
4	5536	17248	1.01%	111	155.39	Internet-Egypt
5	4538	16596	0.97%	293	56.64	ERX-CERNET-BKB China Education and Research Network Center
6	35805	13596	0.80%	657	20.69	SILKNET-AS SILKNET AS
7	14420	13130	0.77%	544	24.14	CORPORACION NACIONAL DE TELECOMUNICACIONES - CNT EP
8	35931	12653	0.74%	6	2108.83	ARCHIPELAGO - ARCHIPELAGO HOLDINGS INC
9	8452	12390	0.73%	1183	10.47	TEDATA TEDATA
10	6389	12249	0.72%	3897	3.14	BELLSOUTH-NET-BLK - BellSouth.net Inc.
11	16526	11337	0.66%	165	68.71	BIRCH-TELECOM - Birch Telecom, Inc.
12	9829	11077	0.65%	816	13.57	BSNL-NIB National Internet Backbone
13	48754	10172	0.60%	1	10172.00	SOBIS-AS SOBIS SOLUTIONS SRL
14	4323	9027	0.53%	4538	1.99	TWTC - tw telecom holdings, inc.
15	8151	8956	0.52%	1536	5.83	Uninet S.A. de C.V.
16	45464	8700	0.51%	43	202.33	NEXTWEB-AS-AP Room 201, TGU Bldg
17	3816	8541	0.50%	514	16.62	COLOMBIA TELECOMUNICACIONES S.A. ESP
18	11492	8475	0.50%	1170	7.24	CABLEONE - CABLE ONE, INC.
19	5800	8120	0.48%	201	40.40	DNIC-ASBLK-05800-06055 - DoD Network Information Center
20	210	8069	0.47%	1113	7.25	WEST-NET-WEST - Utah Education Network
21	14522	7663	0.45%	346	22.15	Satnet
22	36992	7302	0.43%	659	11.08	ETISALAT-MISR
23	28573	7131	0.42%	1078	6.62	NET Servicos de Comunicao S.A.
24	31204	7091	0.42%	26	272.73	SUNCOMMUNICATIONS-AS JV "Sun Communications" Autonomous System
25	10620	7080	0.41%	1072	6.60	Telmex Colombia S.A.
26	4766	6989	0.41%	1857	3.76	KIXS-AS-KR Korea Telecom
27	19262	6904	0.40%	1947	3.55	VZGNI-TRANSIT - Verizon Internet Services Inc.
28	29843	6886	0.40%	6	1147.67	FIVEA-AS1 - FIVE AREA SYSTEMS, INC
29	3464	6859	0.40%	384	17.86	ASC-NET - Alabama Supercomputer Network
30	6713	6844	0.40%	195	35.10	IAM-AS
31	17974	6414	0.38%	1192	5.38	TELKOMNET-AS2-AP PT Telekomunikasi Indonesia
32	20115	6204	0.36%	1509	4.11	CHARTER-NET-HKY-NC - Charter Communications
33	1785	6159	0.36%	1783	3.45	AS-PAETEC-NET - PaeTec Communications, Inc.
34	14117	6021	0.35%	428	14.07	Telefonica del Sur S.A.
35	7545	5898	0.35%	1418	4.16	TPG-INTERNET-AP TPG Internet Pty Ltd
36	174	5881	0.34%	865	6.80	COGENT Cogent/PSI
37	7018	5676	0.33%	1487	3.82	ATT-INTERNET4 - AT&T WorldNet Services
38	7303	5668	0.33%	780	7.27	Telecom Argentina S.A.
39	45595	5418	0.32%	374	14.49	PKTELECOM-AS-PK Pakistan Telecom Company Limited
40	17488	5414	0.32%	1349	4.01	HATHWAY-NET-AP Hathway IP Over Cable Internet
41	32528	5369	0.31%	8	671.12	ABBOTT Abbot Labs
42	27668	5349	0.31%	57	93.84	ETAPA
43	19174	5197	0.30%	1	5197.00	CNC-USA - China Netcom (USA) Operations Ltd.
44	22773	5081	0.30%	1184	4.29	ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc.
45	9498	5067	0.30%	709	7.15	BBIL-AP BHARTI Airtel Ltd.
46	27757	5031	0.29%	109	46.16	CORPORACION NACIONAL DE TELECOMUNICACIONES - CNT EP
47	9198	4987	0.29%	500	9.97	KAZTELECOM-AS JSC Kazakhtelecom
48	18049	4902	0.29%	291	16.85	TINP-TW Taiwan Infrastructure Network Technologie
49	17894	4853	0.28%	21	231.10	APMI-AS-AP AyalaPort Makati, Inc. / Data Center Operator
50	7552	4764	0.28%	653	7.30	VIETEL-AS-AP Vietel Corporation
Total		462878	27.11%

50 Most active ASes for the past 7 days

RANK	ASN	UPDs/Prefix	%	Prefixes	UPDs	AS NAME
1	48754	10172.0	0.60%	1	10172	SOBIS-AS SOBIS SOLUTIONS SRL
2	19174	5197.0	0.30%	1	5197	CNC-USA - China Netcom (USA) Operations Ltd.
3	25090	2415.0	0.14%	1	2415	EOS-AS Energie Ouest Suisse Autonomous System
4	35931	2108.8	0.74%	6	12653	ARCHIPELAGO - ARCHIPELAGO HOLDINGS INC
5	23670	1757.0	0.10%	34	1757	OZSERVERS-AU Oz Servers, Data Centres, Australia Wide
6	29843	1147.7	0.40%	6	6886	FIVEA-AS1 - FIVE AREA SYSTEMS, INC
7	8792	893.0	0.05%	1	893	ASVNET Axel Springer Verlag AG
8	11613	748.0	0.04%	1	748	U-SAVE - U-Save Auto Rental of America, Inc.
9	32528	671.1	0.31%	8	5369	ABBOTT Abbot Labs
10	30600	497.0	0.12%	4	1988	AS-CMN - Cinergy Metronet, Inc.
11	47593	402.0	0.02%	1	402	ATELECOM A-Telcom Ltd
12	38467	394.0	0.02%	1	394	DBAMOYLAN-TRANSIT-AS-AP DBA Moylan
13	44630	389.0	0.02%	1	389	A1799-AS A1799 Military Unit
14	7513	381.0	0.02%	1	381	NETFORWARD Hitachi Information Systems, Ltd.
15	7677	379.0	0.02%	1	379	DNP Dai Nippon Printing Co., Ltd
16	7517	377.0	0.04%	2	754	MII ICOMT Inc.
17	48275	374.0	0.02%	1	374	TSMS-ABKHAZIA-AS Technical Service of Trunk Communications of UPI and SMK of the President of Republic of Abkhazia
18	9352	360.0	0.06%	3	1080	KUMAGAYA KuMaGaYaNet
19	38063	359.0	0.02%	1	359	SANMEDIA-AS SANMEDIA Corporation, Local ISP in JAPAN YONAGO
20	24289	359.0	0.11%	5	1795	KBN Kagawa T.V Broadcast Network Co,.Ltd
21	37908	359.0	0.06%	3	1077	KBC KIBI Cable Television Co.,Ltd.
22	45846	355.0	0.04%	2	710	FSW-SHIGA-POP Shiga area POP AS Number
23	45034	352.0	0.02%	1	352	NORDSEE-AS Nordsee Gesellschaft m.b.H.
24	2521	351.0	0.02%	1	351	IDC2521 Yahoo Japan Corporation
25	24258	351.0	0.02%	1	351	R-PROMETRIC Prometric Japan Co., Ltd.
26	24255	349.0	0.04%	2	698	T-CATV Tannan Cable Television Corporation
27	17505	346.0	0.08%	4	1384	SBMOBILE SOFTBANK MOBILE Corp.
28	17510	346.0	0.02%	1	346	ISID INFORMATION SERVICES INTERNATIONAL - DENTSU, LTD.
29	17688	345.0	0.02%	1	345	SHINENET ShineOn LTD
30	38715	343.0	0.02%	1	343	TOTTORI-REGIONAL-IX-AS Regional-IX ASN Tottori pref Japan.
31	4864	343.0	0.02%	1	343	CS-AS Computer Service Co.,LTD., Tottori Pref, Regional ISP, Japan
32	38653	343.0	0.04%	2	686	JAPANPOST Japan Post Holdings Co., Ltd.
33	17958	343.0	0.08%	4	1372	KCV Kasaoka Cable Vision Co,LTD.
34	18141	343.0	0.02%	1	343	HBA-IDC HBA
35	9607	338.5	0.22%	11	3723	BBTOWER BroadBand Tower, Inc.
36	49970	334.0	0.02%	1	334	RKRS-ISDP Rangin Kaman Rayaneh Sepahan ISDP
37	4725	333.2	2.52%	129	42987	ODN SOFTBANK TELECOM Corp.
38	38033	333.0	0.06%	3	999	YAHOO-JP2-AP internet content provider
39	48309	331.0	0.02%	1	331	AGS-AS Ariana Gostar Spadana Autonomous Number
40	42163	328.0	0.04%	2	656	IRANGATE Rasaneh Esfahan Net Autonomous System ( Irangate Internet Service Provider)
41	49680	327.0	0.02%	1	327	DCI Armaghan Rahe Talaie
42	23926	324.1	0.13%	7	2269	YSM-JP Yahoo Search Marketing Japan
43	49872	323.0	0.02%	1	323	JAHANONLINE Jahan Ruye Khat
44	41152	321.0	0.04%	2	642	AFTAB Aftab Internet Service Provider
45	5618	319.0	0.06%	3	957	DPI DP IRAN
46	47262	318.0	0.04%	2	636	HAMARA-AS Hamara System Tabriz Engineering Company
47	37204	315.1	0.18%	10	3151	TELONE
48	38638	312.1	0.20%	11	3433	IP-CORE Ip Core Corporation
49	50257	309.0	0.04%	2	618	A-MOBILE-AS JV A-Mobile Ltd.
50	23689	302.5	0.04%
Total		39418.1	7.30%

50 Most active Prefixes for the past 7 days

RANK	PREFIX	UPDs	%	Origin AS -- AS NAME
1	91.212.23.0/24	10172	0.50%	48754 -- SOBIS-AS SOBIS SOLUTIONS SRL
2	198.140.43.0/24	6980	0.34%	35931 -- ARCHIPELAGO - ARCHIPELAGO HOLDINGS INC
3	190.65.228.0/22	6027	0.30%	3816 -- COLOMBIA TELECOMUNICACIONES S.A. ESP
4	63.211.68.0/22	5647	0.28%	35931 -- ARCHIPELAGO - ARCHIPELAGO HOLDINGS INC
5	207.254.176.0/20	5197	0.25%	19174 -- CNC-USA - China Netcom (USA) Operations Ltd.
6	41.34.29.0/24	4202	0.21%	8452 -- TEDATA TEDATA
7	206.184.16.0/24	3146	0.15%	174 -- COGENT Cogent/PSI
8	130.36.34.0/24	2600	0.13%	32528 -- ABBOTT Abbot Labs
9	130.36.35.0/24	2598	0.13%	32528 -- ABBOTT Abbot Labs
10	202.92.235.0/24	2440	0.12%	9498 -- BBIL-AP BHARTI Airtel Ltd.
11	193.8.222.0/24	2415	0.12%	25090 -- EOS-AS Energie Ouest Suisse Autonomous System
12	129.66.0.0/17	1918	0.09%	3464 -- ASC-NET - Alabama Supercomputer Network
13	129.66.128.0/17	1913	0.09%	3464 -- ASC-NET - Alabama Supercomputer Network
14	117.20.0.0/24	1757	0.09%	23670 -- OZSERVERS-AU Oz Servers, Data Centres, Australia Wide
15	143.138.107.0/24	1590	0.08%	747 -- TAEGU-AS - Headquarters, USAISC
16	63.99.80.0/21	1377	0.07%	29843 -- FIVEA-AS1 - FIVE AREA SYSTEMS, INC
17	63.99.88.0/22	1377	0.07%	29843 -- FIVEA-AS1 - FIVE AREA SYSTEMS, INC
18	65.216.40.0/21	1377	0.07%	29843 -- FIVEA-AS1 - FIVE AREA SYSTEMS, INC
19	63.96.42.0/23	1377	0.07%	29843 -- FIVEA-AS1 - FIVE AREA SYSTEMS, INC
20	216.229.112.0/20	1377	0.07%	29843 -- FIVEA-AS1 - FIVE AREA SYSTEMS, INC
21	41.190.224.0/23	1193	0.06%	37034 -- RINGO
22	62.193.117.0/24	1147	0.06%	5536 -- Internet-Egypt
23	62.193.109.0/24	1146	0.06%	5536 -- Internet-Egypt
24	201.222.64.0/20	1129	0.06%	25620 -- COTAS LTDA.
25	200.58.184.0/21	1114	0.05%	25620 -- COTAS LTDA.
26	148.204.141.0/24	1100	0.05%	8151 -- Uninet S.A. de C.V.
27	190.186.88.0/21	1041	0.05%	25620 -- COTAS LTDA.
28	190.186.128.0/19	1040	0.05%	25620 -- COTAS LTDA.
29	190.186.112.0/21	1039	0.05%	25620 -- COTAS LTDA.
30	190.186.176.0/22	1035	0.05%	25620 -- COTAS LTDA.
31	190.186.20.0/22	1029	0.05%	25620 -- COTAS LTDA.
32	190.186.40.0/22	1029	0.05%	25620 -- COTAS LTDA.
33	190.186.18.0/24	1006	0.05%	25620 -- COTAS LTDA.
34	62.193.106.0/24	983	0.05%	5536 -- Internet-Egypt
35	62.193.113.0/24	983	0.05%	5536 -- Internet-Egypt
36	62.193.114.0/24	983	0.05%	5536 -- Internet-Egypt
37	62.193.104.0/24	983	0.05%	5536 -- Internet-Egypt
38	62.193.111.0/24	983	0.05%	5536 -- Internet-Egypt
39	62.193.96.0/24	983	0.05%	5536 -- Internet-Egypt
40	62.193.103.0/24	983	0.05%	5536 -- Internet-Egypt
41	62.193.105.0/24	983	0.05%	5536 -- Internet-Egypt
42	62.193.116.0/24	981	0.05%	5536 -- Internet-Egypt
43	62.193.108.0/24	981	0.05%	5536 -- Internet-Egypt
44	62.193.115.0/24	981	0.05%	5536 -- Internet-Egypt
45	62.193.121.0/24	979	0.05%	5536 -- Internet-Egypt
46	62.193.123.0/24	979	0.05%	5536 -- Internet-Egypt
47	203.35.65.0/24	977	0.05%	7545 -- TPG-INTERNET-AP TPG Internet Pty Ltd
48	194.79.114.0/24	977	0.05%	5536 -- Internet-Egypt
49	62.139.73.0/24	943	0.05%	36992 -- ETISALAT-MISR
50	145.243.0.0/16	893	0.04%	8792 -- ASVNET Axel Springer Verlag AG
Total		96090	4.76%

7 Day BGP Profile: 23-July-2010 00:00 - 29-July-2010 23:59 (UTC+1000)

Number of BGP Update Messages:	791919
Number of Prefix Updates:	1708022
Number of Prefix Withdrawals:	332021
Average Prefixes per BGP Update:	2.58
Average BGP Update Messages per second:	1.15
Average Prefix Updates per second:	2.95
Peak BGP Update Message Rate per second:	4511	(16:05:27 Tue, 27-Jul-2010)
Peak Prefix Update Rate per second:	79912	(15:53:58 Tue, 27-Jul-2010)
Peak Prefix Withdraw Rate per second:	16444	(16:00:43 Tue, 27-Jul-2010)
Prefix Count:	336707
Updated Prefix Count:	323951
Stable Prefix Count:	12756
Origin AS Count:	35041
Updated Origin AS Count:	34494
Stable Origin AS Count:	547
Unique Path Count:	212908
Updated Path Count:	174604
Stable Path Count:	38304

Hourly Average of Per-Second Updated and Withdrawn Prefix Rate

Hourly Peak of Per-Second Updated and Withdrawn Prefix Rate

Hourly Average Per-Second Updated Prefix Rate by Update Type

Hourly Peak of Per-Second Updated Prefix Rate by Update Type

BGP Table Activity

Cumulative Distribution of per-Prefix and per-AS Updates

Notes

The data has been gathered using a single eBGP peering with AS 131072. The observations of BGP path change are relative to this observation point. The updates are generated by a Quagga BGP implementation providing a timestamped log of incoming update messages. The timezone of this monitoring point is UTC+1000. Updates are processed on a 24 hour cycle.